12212642218 has 16 divisors (see below), whose sum is σ = 20994284160. Its totient is φ = 5219408016.

The previous prime is 12212642213. The next prime is 12212642219. The reversal of 12212642218 is 81224621221.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 12212642218.

It is not an unprimeable number, because it can be changed into a prime (12212642213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1209921 + ... + 1219972.

It is an arithmetic number, because the mean of its divisors is an integer number (1312142760).

Almost surely, 2^12212642218 is an apocalyptic number.

12212642218 is a deficient number, since it is larger than the sum of its proper divisors (8781641942).

12212642218 is a wasteful number, since it uses less digits than its factorization.

12212642218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2430261.

The product of its digits is 6144, while the sum is 31.

The spelling of 12212642218 in words is "twelve billion, two hundred twelve million, six hundred forty-two thousand, two hundred eighteen".